Also known as Koozie, coozy, huggie, & many more names.
I took the "Pi Bowl for Vase Mode" (https://www.thingiverse.com/thing:3348771)
I shrunk it down & made it taller to fit a standard US 12 oz can & added holes in the bottom for drainage. I also made the numbers protrude less from the cup for easier printing.
It doesn"t really insulate your drink, but it does separate your warm fingers from your cold drink. It provides a better grip and it looks cool!
It could also be a pen cup
1.0mm bottom thickness
Using "Vase Mode" or "Spiralize Outer Contour" (in CURA)
3 versions: round holes, hex holes & NO holes
Check out my "More Beer Cozies" https://www.thingiverse.com/thing:3440555